1985 ZN700 transmission rebuild

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1985 ZN700 transmission rebuild

27 Jun 2026 18:09
#925329
Hey again all,
After 33k miles and 3 sets of hands (a dead guy, my buddy and now me), my 1985 ZN700 Shaft’s 2nd gear has absolutely had it. It slips out of gear and grinds into gear (if you can catch 2nd at all), especially when upshifting. The oil did not come out sparkly, so I imagine alot of the teeth in there are broken.

In sum, it needs to be gone thru badly.

What should I look for in terms of parts and gaskets? Can I swap in a transmission that doesn’t do 5500k rpm at 70? Are there mechanic’s manuals that tell me how to help the transmission? I see there are whole used transmissions on EBay for ~60$.

I want to help this bike, but I have never done this before and I don’t know what I’m doing. I have done top end work, but never as deep as a transmission.

Any help is obliged.
Chris

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